Advance your career with help from our practice exams

Communication: FOURTH PERIOD

A randomized 25 question test from a pool of 761 questions, good luck!
Digital signals are, either specific or transitory, voltage levels represent states of logic. Which of the signal encoding methods below uses the conversion of dc voltage levels to ac to represent logic states?
Each network layer for a DCS has it's own specialized equipment or software. Which of the layers below would allow various workstations to receive data from servers and controllers?
A DCS collects a lot of data during the course of operating. Which of the terms below would best describe the system where data is collected and organized?
In the protocol specifications of Modbus, there are only four types of registers that can be accessed by the master. Which of the terms below is best described as a analog output memory location?
There are several layers in the DCS architecture. Which of the levels below would have direct control over the alarming system?
The field instrument to PLC communication is best defined by which of the answers below?
A DCS collects a lot of data during the course of operating. Which of the terms below would best describe the database that contains all the data required to create a trend in the process?
A modern DCS needs to be able to respond to growing demands. Which of the terms below is best defined as the measure of a system's ability to increase or decrease in performance and cost in response to changes in application and system processing demands.
There are numerous Ethernet standards, a naming formula was developed to identify characteristics of physical connections. Which of the answers below lists all of the information contained in the naming convention?
Which of the answers below best represents the recommended standard that uses an end device circuit to provide the encoding of characters?
Which of the answers best represents the number of cables available for use in the segments of Foundation fieldbus H1 transmission system?
There are many options to choose from for alarm states. Which of the following alarm states can be best described as the initial alarm state when it has been tripped?
Which of the recommended standards below is best describes as a DTE to DCE connection only?
In the protocol specifications of Modbus, there are only four types of registers that can be accessed by the master. Which of the answers below expresses the register size and permissions of an input register?
SCADA systems are specialized utilizations of a process control systems. Which of the terms below can be best defined as the remote measurement component of a control system?
All the wired network components interact with ISO layers. Which of the answers below reflects the ISO layers that the bridge interacts with?
Which of the answers below best represents the first bit sent in a RS-232 asynchronous frame?
The addition of BCC to the message frame increases the efficiency of detecting errors in transmissions. which one of the error check systems employs a calculated total by the receiver in comparison to the total of the received data?
In a motor control function block program, conditional block are used. Which of the answers below is best described as a condition that must remain TRUE for a device can stay activated?
Ethernet network components provide several ISO layers of transmission control. Which of the network components below has transmission controls on the ISO network layer and possibly the data link layers?
There are several different network access methods available to wired Ethernet. Which of the methods below is the one used by wired Ethernet?
There are several layers in the DCS architecture. Which of the levels below would have direct control over the ESD system?
All the wired network components interact with ISO layers. Which of the answers below reflects the ISO layers that the NIC interacts with?
Which of the answers below best represents one of the recommended standards in regards to Instrumentation?
A defined area of geographical coverage is commonly called an area network. Which of the area networks below is the largest in area covered?